Swing fan structure

ABSTRACT

A swing fan structure includes a main body and multiple blades. The main body has an upper face and a lower face. The main body also has a long side and a short side. The blades are side by side disposed on the upper face of the main body in parallel to each other. The blades define therebetween a flow way. The blades are drivable by the main body to reciprocally move along the long side to create an air volume. The swing fan structure has a greatly minified volume. Also, the swing fan structure overcomes the shortcoming of unstable operation of the conventional fan caused by deflection of the blades in rotation.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a swing fan structure, and more particularly to a swing fan structure, which has a greatly minified volume. Also, the swing fan structure overcomes the shortcoming of unstable operation of the conventional fan caused by deflection of the blades in rotation.

2. Description of the Related Art

Along with the continuous advance of electronic technologies and industries, the density of transistors of various chips (such as central processor and execution unit) has been more and more increased. This enables the central processor to process data at higher and higher speed. However, the power consumption and heat generated by the central processor have also become higher and higher. In order to keep the central processor stably operating, it has become an important topic how to develop high-efficiency heat dissipation unit for dissipating the heat generated by the central processor.

In order to keep a high-efficiency heat dissipation function, the heat dissipation unit has inevitably become larger and larger and heavier and heavier. However, in design of electronic device such as laptop, tablet, intelligent mobile phone and intelligent handheld electronic device, the limitation of space is always a greatest bottleneck of the design process.

Please refer to FIG. 1, which is a perspective assembled view of a conventional fan module 1. The fan module 1 includes a centrifugal fan 10, a heat pipe 11 and a heat dissipation unit 12. The centrifugal fan 10 serves to drive air to flow so as to carry away the heat of the heat dissipation unit 12 and lower the temperature. The performance of the fan module 1 is determined by the wind pressure and air volume of the centrifugal fan 10 and the heat exchange area of the heat dissipation unit. The larger the heat exchange area of the heat dissipation unit 12 is, for example, the longer the radiating fin is, the better the heat dissipation effect of the heat dissipation unit 12 is. However, the increase of the length of the radiating fin will lead to excessively large total volume of the fan module. This fails to meet the requirements for lightweight, slimness and miniaturization of the laptop.

In order to meet the requirements for lightweight, slimness and miniaturization, the respective components are as minified as possible. Therefore, the centrifugal fan is miniaturized. However, due to the miniaturization of the volume, the blades of the centrifugal fan are very thin. This will cause more vibrations and make louder noise.

According to the above, the conventional fan module has the following shortcomings:

1. The volume is larger.

2. The blades tend to deflect in rotation to cause unstable operation.

SUMMARY OF THE INVENTION

It is therefore a primary object of the present invention to provide a swing fan structure, which has a greatly minified volume.

It is a further object of the present invention to provide the above swing fan structure, which overcomes the shortcoming of unstable operation of the conventional fan caused by deflection of the blades in rotation.

To achieve the above and other objects, the swing fan structure of the present invention includes a main body and multiple blades. The main body has an upper face and a lower face opposite to the upper face. The main body also has a long side and a short side. The blades are side by side disposed on the upper face of the main body in parallel to each other. Each blade has a locating section disposed on the upper face and a first end extending from the locating section along the short side of the main body. The blades define therebetween a flow way. The blades are drivable by the main body to reciprocally move along the long side.

In the above swing fan structure, the locating sections of the blades are located on the upper face of the main body with the first ends of the blades extending along the short side of the main body. When a power member is turned on, the main body is driven by the power member to move along the long side. At this time, the blades are driven by the main body to reciprocally move. Due to the wing-shaped configuration of the blades and the specific aerodynamic property of the wing-shaped configuration, the airflow around the first ends of the blades are changed to create an air volume through the flow ways. Accordingly, the swing fan structure can be used instead of the conventional fan to minimize the volume of the fan. Also, the swing fan structure overcomes the shortcoming of unstable operation of the conventional fan caused by deflection of the blades in rotation.

BRIEF DESCRIPTION OF THE DRAWINGS

The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:

FIG. 1 is a perspective assembled view of a conventional fan structure;

FIG. 2A is a perspective exploded view of a first embodiment of the swing fan structure of the present invention;

FIG. 2B is a perspective assembled view of the first embodiment of the swing fan structure of the present invention;

FIG. 3A is a perspective exploded view of a first embodiment of the swing fan structure of the present invention;

FIG. 3B is a perspective assembled view of the first embodiment of the swing fan structure of the present invention;

FIG. 4A is a perspective exploded view of a second embodiment of the swing fan structure of the present invention;

FIG. 4B is a perspective assembled view of the second embodiment of the swing fan structure of the present invention;

FIG. 5A is a perspective exploded view of a third embodiment of the swing fan structure of the present invention;

FIG. 5B is a perspective assembled view of the third embodiment of the swing fan structure of the present invention;

FIG. 6 is a perspective exploded view of a fourth embodiment of the swing fan structure of the present invention; and

FIG. 7 is a perspective assembled view of a fifth embodiment of the swing fan structure of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIGS. 2A and 2B. FIG. 2A is a perspective exploded view of a first embodiment of the swing fan structure of the present invention. FIG. 2B is a perspective assembled view of the first embodiment of the swing fan structure of the present invention. According to the first embodiment, the swing fan structure of the present invention includes a main body 20 and multiple blades 21. The main body 20 has an upper face 201 and a lower face 202 opposite to the upper face 201. The main body 20 also has a long side 203 and a short side 204. The blades 21 are disposed on the upper face 201 of the main body 20 in parallel to each other. The blades 21 define therebetween a flow way 214. The blades 21 are drivable by the main body 20 to reciprocally move along the long side 203.

Please refer to FIGS. 3A and 3B. FIG. 3A is a perspective exploded view of the first embodiment of the swing fan structure of the present invention. FIG. 3B is a perspective assembled view of the first embodiment of the swing fan structure of the present invention. The swing fan structure of the present invention includes a main body 20 and multiple blades 21. The main body 20 has an upper face 201 and a lower face 202 opposite to the upper face 201. The main body 20 also has a long side 203 and a short side 204. The blades 21 are side by side disposed on the upper face 201 of the main body 20 in parallel to each other. Each blade 21 has a locating section 211 disposed on the upper face 201 and a first end 212 extending from the locating section 211 along the short side 204 of the main body 20. The blades 21 define therebetween a flow way 214. The blades 21 are drivable by the main body 20 to reciprocally move along the long side 203.

The blade 21 is wing-shaped. The wing-shaped blade 21 has such an aerodynamic property that the direction of force can be changed due to its shape. For example, a horizontal push force can be converted into lift force or a horizontal rotational torque can be converted into a vertical push force.

Further referring to FIGS. 3A and 3B, the swing fan structure further includes a case 22 having at least one bottom board 221 and two sidewalls 222 disposed on two opposite sides of the bottom board 221. The bottom board 221 and the sidewalls 222 together define a receiving space 223 for receiving the main body 20 and the blades 21. The receiving space communicates with the flow way 214 between the blades 21.

Please now refer to FIGS. 4A and 4B. FIG. 4A is a perspective exploded view of a second embodiment of the swing fan structure of the present invention. FIG. 4B is a perspective assembled view of the second embodiment of the swing fan structure of the present invention. Also referring to FIG. 3A, the second embodiment is partially identical to the first embodiment in component and relationship between the components and thus will not be repeatedly described hereinafter. The second embodiment is mainly different from the first embodiment in that the upper face 201 of the main body 20 has multiple assembling sections 205 arranged along the long side 203. The locating section 211 of the blade 21 has a connection section 215 connected to the assembling section 205. The assembling section 205 is an insertion hole or a threaded hole. The connection section 215 is an insertion pin, a screw or a rivet. The connection section 215 is connected to the assembling section 205 by means of insertion, screwing or riveting.

The swing fan structure further includes a power member 3 connected to the main body 20. The power member 3 has a cam 32 and a connection member 31 connected to the cam 32. Multiple slide rails 33 are disposed on inner sides of the sidewalls 222 of the case 22 corresponding to four corners of the main body 20. The four corners of the main body 20 are slidably disposed on the slide rails 33. Accordingly, the blades 21 can be driven by the main body 20 to reciprocally move within the receiving space 223 along the long side 203.

According to the above arrangement, the locating sections 211 of the blades 21 are located on the upper face 201 of the main body 20 with the first ends 212 of the blades 21 extending along the short side 204 of the main body 20. When the power member 3 is turned on, the main body 20 is driven by the power member 3 to move along the long side 203. At this time, the blades 21 are driven by the main body 20 to reciprocally move. Due to the wing-shaped configuration of the blades 21, the airflow around the first ends 212 of the blades 21 are changed to create an air volume through the flow ways 214. Accordingly, the swing fan structure can be used instead of the conventional fan to minimize the volume of the fan. Also, the swing fan structure overcomes the shortcoming of unstable operation of the conventional fan caused by deflection of the blades in rotation.

Please now refer to FIGS. 5A and 5B. FIG. 5A is a perspective exploded view of a third embodiment of the swing fan structure of the present invention. FIG. 5B is a perspective assembled view of the third embodiment of the swing fan structure of the present invention. The third embodiment is partially identical to the first embodiment in component and relationship between the components and thus will not be repeatedly described hereinafter. The third embodiment is mainly different from the first embodiment in that multiple blades 21 are further disposed under the lower face 202 of the main body 20. The blades 21 are side by side disposed under the lower face 202 of the main body 20 in parallel to each other. In this embodiment, both the upper and lower faces 201, 202 of the main body 20 are provided with the blades 21. When the power member 3 is turned on, the main body 20 is driven by the power member 3 to move along the long side 203. At this time, the blades 21 are driven by the main body 20 to reciprocally move. Due to the wing-shaped configuration of the blades 21, the airflow around the first ends 212 of the blades 21 are changed to create an air volume through the flow ways 214. Accordingly, the swing fan structure can be used instead of the conventional fan to minimize the volume of the fan. Also, the swing fan structure overcomes the shortcoming of unstable operation of the conventional fan caused by deflection of the blades in rotation.

Please now refer to FIGS. 6 and 3A. FIG. 6 is a perspective exploded view of a fourth embodiment of the swing fan structure of the present invention. The fourth embodiment is partially identical to the first embodiment in component and relationship between the components and thus will not be repeatedly described hereinafter. The fourth embodiment is mainly different from the first embodiment in that the blade 21 further has a second end 213 extending from the locating section 211 along the short side 204 of the main body 20 in a direction reverse to the first end 212. One of the first and second ends 212, 213 of the blade 21 or both of the first and second ends 212, 213 of the blade 21 are made of flexible material.

According to the above arrangement, when the power member 3 is turned on, the main body 20 is driven by the power member 3 to move along the long side 203. At this time, the blades 21 are driven by the main body 20 to reciprocally move. Due to the wing-shaped configuration of the blades 21 and the specific aerodynamic property of the wing-shaped configuration, the airflow around the first and second ends 212, 213 of the blades 21 are changed to create a greater air volume through the flow ways 214. Accordingly, the swing fan structure can be used instead of the conventional fan to minimize the volume of the fan. Also, the swing fan structure overcomes the shortcoming of unstable operation of the conventional fan caused by deflection of the blades in rotation.

Please now refer to FIG. 7, which is a perspective assembled view of a fifth embodiment of the swing fan structure of the present invention. The fifth embodiment is partially identical to the first embodiment in component and relationship between the components and thus will not be repeatedly described hereinafter. The fifth embodiment is mainly different from the first embodiment in that the swing fan structure includes multiple main bodies 20 and multiple blades 21 disposed on the main bodies 20. The main bodies 20 are serially connected with each other to form a large-size swing fan structure. This can achieve the same effect as the above embodiments.

In conclusion, in comparison with the conventional fan structure, the present invention has the following advantages:

1. The volume of the fan structure is greatly reduced.

2. The shortcoming of unstable operation of the conventional fan structure caused by deflection of the blades in rotation is overcome.

The present invention has been described with the above embodiments thereof and it is understood that many changes and modifications in the above embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims. 

What is claimed is:
 1. A swing fan structure comprising: a main body having an upper face and a lower face opposite to the upper face, the main body also having a long side and a short side; and multiple blades side by side disposed on the upper face of the main body in parallel to each other, the blades defining therebetween a flow way, the blades being drivable by the main body to reciprocally move along the long side.
 2. A swing fan structure comprising: a main body having an upper face and a lower face opposite to the upper face, the main body also having a long side and a short side; and multiple blades side by side disposed on the upper face of the main body in parallel to each other, each blade having a locating section disposed on the upper face and a first end extending from the locating section along the short side of the main body, the blades defining therebetween a flow way, the blades being drivable by the main body to reciprocally move along the long side.
 3. The swing fan structure as claimed in claim 2, further comprising a case having at least one bottom board and two sidewalls disposed on two opposite sides of the bottom board, the bottom board and the sidewalls together defining a receiving space for receiving the main body and the blades, the receiving space communicating with the flow way between the blades.
 4. The swing fan structure as claimed in claim 1, wherein the blades are wing-shaped.
 5. The swing fan structure as claimed in claim 3, wherein the upper face of the main body has multiple assembling sections arranged along the long side, the locating section of the blade having a connection section connected to the assembling section.
 6. The swing fan structure as claimed in claim 5, wherein the assembling section is an insertion hole or a threaded hole and the connection section is an insertion pin or a screw, the connection section being connected to the assembling section by means of insertion or screwing.
 7. The swing fan structure as claimed in claim 6, wherein multiple blades are further disposed under the lower face of the main body, the blades being side by side disposed under the lower face of the main body in parallel to each other.
 8. The swing fan structure as claimed in claim 2, wherein the blade further has a second end extending from the locating section along the short side of the main body in a direction reverse to the first end.
 9. The swing fan structure as claimed in claim 8, wherein the first and second ends of the blade are made of flexible material.
 10. The swing fan structure as claimed in claim 3, further comprising a power member connected to the main body for driving the main body, whereby the blades can be driven by the main body to reciprocally move along the long side.
 11. The swing fan structure as claimed in claim 10, wherein the power member has a cam and a connection member connected to the cam, multiple slide rails being disposed on inner sides of the sidewalls of the case corresponding to four corners of the main body, the four corners of the main body being slidably disposed on the slide rails, whereby the main body can be driven to reciprocally move within the receiving space. 